Automatic safety gas-burner



(No Model.)

A. MEYER. AUTOMATIC SAFETY GAS BURNER. No. 333,653.

Patented Jan. 5, 1,886.

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vvmvcssts INVENTOR p ATTORNEYS UNITED STATES PATENT OFFICE.

AUGUST MEYER, OF BALTIMORE, MARYLAND.

AUTO MATIC SAFETY GAS-BURNER.

SPECIFICATION forming part of Letters Patent No.333,653, dated January 5, 1886.

Application filed January 24, 1883. Serial No. 82,924. {No model.)

To aZl whom it may concern:

Be it known that I, AUGUST MEYER, a citizen of the United States, residing at Baltimore, Maryland, have invented certain new and useful Improvementsin Automatic Safety- Burners, of which the following is aspecification, reference being had to the accompanying drawings, forming part hereof, in which- Figure 1 is a vertical section of my burner, showing the position of the parts when the gas has been turned off. Fig. 2 is a similar View showing the position of the parts after the gas has been turned on and burning a short time. Fig. 3 is a similar view showing the position of the parts automatically shutting off the gas after it has been blown out or otherwise accidentally extinguished without turning it off; and Fig. 4 is an elevation of my burner, the valve-stem being seen in section.

Like letters refer to the same parts in all the figures.

The object of my invention is to provide a gas-burner in which the gas will be automatically turned off should the flame be accidentally extinguished by blowing out or otherwise without turning the gas off, said automatic action being caused by the unequal expansion and contraction of different metals used in the construction of the burner; and to this end my invention consists in the arrangement and combination of parts, which will be described hereinafter, and specifically pointed out in the claims.

Referring to the drawings by letter, A is the main body of the burner, which is perforated, as is usual in gas-burners, and is provided with a cross-bore to receive a valve-stem, B, which, so far as it is constructed to allow or obstruct the passage of gas, is as usual in ordinary burners. The upper end of the body A. is closed, and just below this upper end there is another cross-bore to receive a conical valve stem or plug, a. This plug is secured near one end of a bow, 0, made of metal, as hereinafter described, the other end of which is secured to the body A on the opposite side of the burner. The extremity of the free end of this how is formed into a hook, as shown at c. The valve-stem B is conical, and is secured in its seat bya screw, b, as is usual, and is provided with a flat handle, B, by which it may be turned. On the same side of the burner as the free end of the bow 0 there is a cam-piece, D, having an inclined upper end, d, which moves freely in a hole in the stem extending upward from the seat of the valvestem B, and immediately below this cam-piece D the valve-stem B is transversely grooved, as at d, the bottom of said groove forming a cam, as shown in Fig. 4. The cam-piece D isnormally held in its lowest position by a spring, 6, which is coiled around the upper end ofthe body A. The body of the burner is provided with an exterior screw-thread to engage an interior thread in the cap E of the burner, which cap incloses all the mechanism, and is provided at its top with a tip, F, of any approved construction. The bowO is composed of two strips of metal having different degrees of expansibility by heat, as brass and steel the steel, having less expansibility, being on the outside, and the brass, having more, being on the inside. The normal position of this bow is such as brings its free end near enough to the body of the burner to cause the plug to be held in its seat, thus cutting olf the flow of gas unless it is removed.

The operation of my device is as follows, viz: The burner being in condition shown in Fig. 1, it is desired to light the gas. All that is'necessary is to turn the valve-stem B in the usual manner. This will allow the gas to pass outto the tip F, and thence to the outer air, where it may be ignited. In theposition just namedviz., that shown in Fig. l--the bot tom of the cam-piece D rests on the periphery of the valve-stem B, and is therefore in its highest position, and its inclined upper sur: face has passed within the free end of the bow, forcing it outward and carrying plug a with it, the hook on the freeend of. the bow engaging a similar one on the cam-piece D. When the valve-stem B is turned to let on the gas, the lower end of the cam-piece would drop into the groove (1' but for the support it receives by the engagement of its hook with that of the how. The gas being ignited, the bow is heated, and the inner strip expanding more rapidly than the outer tends to straighten the bow, thus forcing the free end outward, carrying with it the plug a. As long as the gas is burning, the heat will maintain the bow in this position, and the cam-piece D, nolonger supported by the bow, is forced by the spring e downward into the groove d in the valvestem B. This will be the condition of afi'airs after lighting the gas, and is shown in Fig. 2. Now, should the fiame be extinguished by blowing out or by any accident without turning the gas off by means of valve B B, the bow will soon cool off and resume its normal position, as seen in Fig. 3, thus automatically cutting off the flow of gas. The plug a will remain in this position until the valve-stem is turned again to the position shown in Fig. 1, when the burner is again ready for use.

I am aware that a combination spring or band composed of brass and steel, and formed as herein shown, substantially, is old, and I do not claini such, the point of novelty in myinvention being in the direct connection of the valve-plug to the bow, and other features described and hereinafter claimed.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent of the United States, is

1. The combination, with a gas-burner, of an auxiliary valve stem or plug, a bow of metal secured to the burner, consisting of two strips, the outer one having a lesser degree of expansibility than the inner one, the valve B,

and cantpiece D, whereby said plug is held out of its seat when the bow is heated by the burning gas and automatically forced into its seat when the bowis cold, thus cutting off the supply of gas when the flame is extinguished,

as set forth.

2. The combination of a gas-burner, an elastic bow-composed of an outer and inner strip of metal of different degrees of expansibility, one end of which bow is secured to the body of the burner, while the other end carries a valve stem or plug. the valve B, and cam-piece D, as and for the purpose set forth.

3. The combination, in a gas-burner, of the body A, valve B B, bow O, valve to, cam-piece D,'spring e, and the can] on VZLIVGSIZGLII B, as and for the purpose set forth.

4.. The combination of the body A having perforations longitudinally and transversely thereof,-as described, valve-stem B, having cam-groove, bow G, of brass inner and steel v AUGUST MEYER.

In presence of- S. BRASHEARS, J OHN T. MADDox. 

